Cinematographic view taking apparatus



Sept. 27, 1932'. A. L. v. c. DEBRI 'CINEMATOGRAPHIC VIEW` TAKING APPARATUS m .n a 6 .L l 1 A //Y\ s m www@ V//////////// m g -l m l 0,4 luk Patented sept. 27, i932 UNITED STATES PATENT oFF-ICE .ANDR LoN vIc'ron. CLMENT DEBBIE, or rams, manon ommroenarnro vmw 'rame Arraiwrus Application led September 6, 1927, Serial No. 217,861, and in France October 18, 1926.

It is' known that in cinematographic view taking apparatuses the film is, whilst it is exb posed in front of the view taking aperture, kept in place by registering pins Whilst it is held down against this aperture by a pressure plate while it is simultaneously released from the driving claws. The action of the registering pins and pressing plate should cease as soon as the view taking is'ended so as to allow the iilm to be again driven by the claws.

My invention relates to a common control device for the reciprocation of the registering pins and pressure plate, the said reciprocation being positively controlled both for the forward and for the rearward movement of the parts.

A form of execution of the invention is shown by wa of example on appended drawings whereofsz,

Fig. 1 is a front view of the devlce.'

Fig. 2 is a vertical-sectional view along line 2 2 of Fig. 1, said view being continued through the film gate. Fig. 3 is a horizontal section along line 3 3.

Fig. 4 is a horizontal section along line 4 4 and Fig. 5is a horizontal section along line 5 5 (Fig..2).

Fig. 6 shows a modification.

The shaft 1 driven by the controlling mechanism and which is vertical in the oase illustrated, controls the film-advancing means constituted by the claws 31 shown on Fig. 6.

shaped enlargement 2 (Fig. 2) so as to completely Jfree the view taking aperture in the film 'gate 3, when it is desired to focus in which case it is suiiicient to give the shaft 1 an angular position erpendicular to that shownin Figure 3. a substantially horizontal groove is keyed to the shaft 1. The grooved cam is shown in horizontal cross section on Fig. 5.

' In this groove runs a roller 5V pivoting freely round a spindle 6 secured to the carriage 7 bearing a dove-tailed guidin part 8 sliding in the stationary slide 9 where the carriage is caused under the action of the rotation of4 the grooved cam to move reciprocatingly 5 along a straight line in the direction of the provided in their center with opening so as to free the view taking aperture -3 and to allow focusing.

The said shaft is provided with a frame-y cam 4 provided with;

optical axis of the apparatus. The carriage 7 ears on its under side a socket shaped part 10 whlch is engaged by andwherein is held a projection 11 secured to a double lever 12 comprising a crossbar and two lateral arms disposed on either side of the view taking aperture 3 (Fig. 1). This lever is pivotally secured along the horizontal line 13 13 on the front plate 14.

To the two arms of the lever 12 is pivw otally secured along the horizontalline 15 15 the pressing plate comprising two frames 16-16 engaging each other for instance through a sliding movement and separated by springs 17, four for instance, which 5 urge the frame 16 slightly away from frame 16. -This device has for object to make the lm always bear perfectly against the view f' taking aperture without crushing it if it is thicker than the standard thickness and without failing to press it at all if it is thinner. Moreover owing to this extensibility of the pressing device it is possible durin adjustment to give a greater length to t e stroke of the lever 12 so as to compensate for wear 75 of the parts. The tworames 16 16 are aA rectangular Moreover at the lower part of the lever arms 12 are pivotally secured at 19, 19,the registering pins 20-20 which are guided perpendicularly to the'fllm surface in the slides 21' 21 (Fig. 4). f

It is apparent that when the cam 4 rotates, 35 driven by the shaft 1, the roller 5 gives the vcarriage 7 a reciprocating rectilinear movement which causes' the lever 12 to swing. round its bearings 13 13. The resultis that the registering pins 20 20 and the pressing '9o device 16--16 are periodically moved for- Wards sothat nthe registerin ins engage the film perforatios 18 an t e pressing device 16 comes in contact with the said film, the'raine 16 continuing its forwardmove- .95 ment and pressing the springs 17 until the rframe lpresses strongly against the'flm.

The pins and pressing device are then moved rearwards in` a positive manner by the return stroke of the carriage 7 and release the film. 100

The former motion is provided when the driving claws 31 release the film and the second when the clutches 31 reengage the film.

A modified form of execution allowing the carriage 7 and its slide 9 to be omitted, would consist as shown on Fig. 6 in extending part 11 of the lever perpendicularly to the two arms 12 and suitably securin to this extenf sion the roller 5 which in t is case should have a spherical shape so that it engages during working the groove of cam 4. p

It should be noted that the arrangement, shown in Figure 2 or in Figure 6 may be alpplied toa large variety of apparatuses', c ieiiy in apparatuses of the type disclosed in m co-pending application 109,937 filed on ay 18, 1926, and now U. S. Patent No. 1,855,128 issued April 19, 1932, comprising a device for focusing on a ground glass. In the said co-pepding application and patent a plate of cir'cular shape carrying the iilm ate and provided with an opening closed y aground glass angularly isposed with reference thereto is adapted to rotate in its plane in front of the ilm gate in a manner such that the film is shifted sideways and replaced by the ound glass for focusing purposes. This p ate may be easily adapte to the apparatus according to my present invention as shown in Fi 2 where it may form the plate 14 carrying t e lever bearing in its turn the registering pins and pressure plate. In this case the plate 14 is adapted to move in its own plane round its centre. When it is desired to move this plate provided with a ground glass for focusing, part 11 of the lever is disengaged from the socket 10 which l remains secured to the carriage 7 in its original position. Thus the plate, lever and parts borne thereby may be moved bodily in a very eas manner. l

the form of execution shown on Fi 6, it is suiiicient for obtaining the same re t to rovide. in a suitable pomt of the outer wail of the groove of cam 4 an aperture 32 slightly larger than the diameter of the roller, so that when for any reason such as for focusing, the plate 14 similar in all respects to the plate 14 of Fig. 2 is made to rotate in its plane, it will carry with it the registerin pins, the pressing device, the lever 12 an the roller which is mounted on the extension A 11 of the latter, said roller having previously disengaged the cam 4 in which it moves. The roller will move easily out of the cam 4 and will reenter it reversely when the late 14 is set back in its original position, t e apparatus having been previously stopped m a manner such` as will have brought the abovementioned outer opening in the cam in front of the roller. A

. The main control shaft A controls 1n the v usual manner through the bevel gears 33 amd-0n of the film driving rl81ws`sucl1v as 31 and 34, the' reciprocatmg inward and outward Lman in their carriage 35, .while the shaft 1 is controlled directly through the bevel gear 34.

What I claim is:

1. A control device for cinematographic apparatuses comprising film-advancing means, a shaft controlling said means, a film gate, a lever adapted to pivot round an axis parallel to the film gate and per endicular to the direction of,motion of the registering pins secured to said lever, a part driven by the shaft provided with a camshaped groove, a roller guided between the edges of the groove, a mechanical connection between the roller and the lever for positively driving same under the action of the movement of the cam irst in one direction and then in the reverse direction, a pressure plate fin front of the film ate and means for pivotally securing sai pressure plate to the axis of the lever.

2. A control device for cinematographic apparatuses comprising film-advancing means, a shaft controlling said means, a film gate, a lever adapted` to pivot round an axis parallel to the ilm gate and per endicular to the direction of motion of the lm, registering pins secured to said lever, a grooved cam actuated by the shaft, a stationary rectilinear slide, a carriage adapted to reciprocate 93 along said slide, a roller pivotallyvborne by the carriage and engaging the groove in the cam, means whereby the carriage is adapted to positively impart a rocking motion tothe lever in both-dlrections, a pressure late in front of the ilm gate, and means or pivotally securing sald pressure plate to the lever along an axis parallel to the pivoting axis of the lever.

3. A control device for cinematographic apparatuses comprising -advancing means, a shaft controlling said means, a film gate, a lever ada ted to pivot round an axis parallel to the gate and per ndicular to the direction of motion of the filin, registerin pins secured to said lever, a grobved cam orne by the shaft, a pressure plate disposed in front' of the film gate and -pivotally secured to the lever along an axis parallel to the pivoting axis of the "lever, a stationary rectilinear slide, a carriageadapted to reciprocate along said slide, a roller pivotally borne by the carriagel land engaging the groove in the cam, and a socket borne by the' carriage and in which the lever is adapted to engage loosely.

4. A' control device for cinematographic apparatuses comprising. 51m-advancing means, a shaft controlling said means, a film gate, a lever adapted to pivot round an axis parallel tothe film gate and per endicular to the direction of motion of t e registering pins secured to said lever, a grooved cam actuated by theshaft, means connecting the cam and the lever to positively impart a Yrocking motion tothe lever both directions, a pressure plate in front of the filmv zo gli which one end of the lever is adapted to gate comprising two elementary substantial- ,1y similar frames di osed one behind the other and springs etween said frames urging them apart, and means for pivotally securing said pressure plate to the lever along an axis parallel to the pivoting axis of the lever.

5. A control device for cinematographic apparatuses comprising film-advancing means, a shaft controlling said means, a film glta, a plate parallel to and carrying the gate provided with an aperture registering therewith and adapted to move in its plane round its centre, a lever pivotally secured to the plate along an axis normally erndicular to the direction of motion ofp the registering pins secured to said lever, a ooved cam actuated by the shaft a socket engage loosely,| a pressure plate in front of the film gate pivotally secured to the lever along an axis parallel to the ivotin'g axis of the lever, and means where y the "cam is adapted to positively impart a rocking niotion to the socket towards and away` from the film gate. c

6. A control device for cineniatographic apparatuses comprising advancing means, a shaft controlling said means, a ilm gate, a plate parallel to and carrying the lm gate, provided with an aperture registering therewith and adapted to move in lts plane round its centre, a lever pivotally secured to the plate along an axis normally perpendicular to the direction of motion of the film, registering pins secured to said 'lever a ooved cam actuated by the shaft a soclxet,

m which one end of the lever is adapted to engage loosely, a pressure plate in front of the iilm gate pivotally secured to the lever along an axis parallel to the pivotingl axis of the lever, a stationary rectilinear sli e, a carriage adapted to reciprocate along said slide, and bearin the socket and aroller pivotally borne y the carriage `and engaging the groove in the cam.

In testimony whereof I have/signed my name to this specification.

' marmi Lton'vlcrok CLEMENT num. 

